NVIDIA GeForce 620M vs NVIDIA GeForce GT 640M

Comparative analysis of NVIDIA GeForce 620M and NVIDIA GeForce GT 640M videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory, Technologies. Benchmark videocards performance analysis: PassMark - G3D Mark, PassMark - G2D Mark, Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).

NVIDIA GeForce 620M

NVIDIA GeForce GT 640M

Differences

Reasons to consider the NVIDIA GeForce 620M

2.1x lower typical power consumption: 15 Watt vs 32 Watt

Thermal Design Power (TDP)	15 Watt vs 32 Watt

Reasons to consider the NVIDIA GeForce GT 640M

4x more pipelines: 384 vs 96
2x better floating-point performance: 480.0 gflops vs 240.0 gflops
2x more maximum memory size: 2 GB vs 1 GB

Pipelines	384 vs 96
Floating-point performance	480.0 gflops vs 240.0 gflops
Maximum memory size	2 GB vs 1 GB

Compare benchmarks

GPU 1: NVIDIA GeForce 620M
GPU 2: NVIDIA GeForce GT 640M

Name	NVIDIA GeForce 620M	NVIDIA GeForce GT 640M
PassMark - G3D Mark		923
PassMark - G2D Mark		198
Geekbench - OpenCL		3184
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		7.861
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		275.972
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.727
CompuBench 1.5 Desktop - Video Composition (Frames/s)		15.445
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		17.381
GFXBench 4.0 - Car Chase Offscreen (Frames)		1476
GFXBench 4.0 - Manhattan (Frames)		1963
GFXBench 4.0 - T-Rex (Frames)		2580
GFXBench 4.0 - Car Chase Offscreen (Fps)		1476
GFXBench 4.0 - Manhattan (Fps)		1963
GFXBench 4.0 - T-Rex (Fps)		2580

Compare specifications (specs)

	NVIDIA GeForce 620M	NVIDIA GeForce GT 640M
Essentials
Architecture	Fermi 2.0	Kepler
Code name	GF117	GK107
Launch date	22 March 2012	22 March 2012
Place in performance rating	not rated	1346
Type	Desktop	Laptop
Technical info
Core clock speed	625 MHz
Floating-point performance	240.0 gflops	480.0 gflops
Manufacturing process technology	28 nm	28 nm
Pipelines	96	384
Texture fill rate	10 GTexel / s
Thermal Design Power (TDP)	15 Watt	32 Watt
Transistor count	585 million	1,270 million
Boost clock speed		645 MHz
CUDA cores		384
Video outputs and ports
Display Connectors	No outputs	No outputs
HDCP
HDMI
Maximum VGA resolution		Up to 2048x1536
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Bus support		PCI Express 2.0, PCI Express 3.0
Laptop size		medium sized
API support
DirectX	12.0 (11_0)	12 API
OpenGL	4.6	4.5
OpenCL		1.1
Memory
Maximum RAM amount	1 GB	2 GB
Memory bandwidth	14.4 GB / s
Memory bus width	64 Bit	128bit
Memory clock speed	1800 MHz	1800 MHz
Memory type	DDR3	DDR3\GDDR5
Shared memory		0
Technologies
3D Blu-Ray
3D Vision
CUDA
DirectCompute
DirectX 11		DirectX 11
Optimus